The Madison Road Race Optimus Softshell Knee Warmers. The ultimate cold weather warmer, the Optimus softshell knee warmer keeps the rain away from the skin without letting you overheat. Unlike other softshell garments, the Optimus warmers provide huge amounts of 4-way stretch for a superb fit Madison Road Race Optimus Softshell Knee Warmers Features Perfectly matched with the Road Race Optimus bib shorts Unlike other softshell garments, the Optimus warmers provide huge amounts of 4-way stretch for a superb fit The waterproof softshell fabric provides excellent warmth even when wet Lightweight Lycra fabric behind the knee to prevent overheating Flatlock stitching eliminates any unwanted chaffing or discomfort Reflective details for low light visibility Silicone printed leg grippers ensure a secure fit